/* AIC — learner-facing UI. Tokens from the extracted design system (Sonytech teal skin). */
@font-face{font-family:"Plus Jakarta Sans";font-weight:200 800;font-display:swap;src:url(/fonts/PlusJakartaSans-latin.woff2) format("woff2")}
:root{
  --font:"Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --page:#F4FAF9;--bg:#fff;--surface:#EEF6F5;--surface-2:#E1EFED;--line:#DCE9E7;--line-strong:#C7DAD7;
  --ink:#0B1F1D;--ink-2:#2B4542;--ink-3:#5E7774;
  --accent:#0F766E;--accent-hover:#0B5F59;--accent-soft:#D9F2EE;--accent-ink:#fff;
  --ok:#0B954D;--ok-soft:#E3F7EC;--danger:#D6383D;--danger-soft:#FDECEC;--warn:#B77900;--warn-soft:#FFF4D6;
  --r:14px;--r-lg:24px;--sh:0 4px 14px rgba(15,118,110,.08);--sh-pop:0 24px 60px -24px rgba(15,60,56,.35);
  --ring:0 0 0 3px #D9F2EE;--ease:cubic-bezier(.2,.7,.2,1)
}
*{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--page);color:var(--ink);line-height:1.5;min-height:100vh;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.15;letter-spacing:-.03em;font-weight:800;text-wrap:balance}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.wrap{max-width:1120px;margin:0 auto;padding:0 clamp(16px,4vw,32px)}
.mono{font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;font-weight:700;color:var(--ink-3)}

/* header */
.top{position:sticky;top:0;z-index:20;background:rgba(244,250,249,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink);letter-spacing:-.02em;font-size:1.05rem}
.brand:hover{text-decoration:none}
.brand img{height:30px;width:auto}
.brand small{color:var(--accent);font-weight:800;border:1.5px solid var(--accent);border-radius:7px;padding:1px 7px;font-size:.72rem;letter-spacing:.06em}
.nav{display:flex;gap:6px;margin-left:auto;align-items:center}
.nav a{color:var(--ink-2);font-weight:600;font-size:.9rem;padding:8px 12px;border-radius:10px}
.nav a:hover{background:var(--surface-2);text-decoration:none}
@media(max-width:640px){.nav .hide-s{display:none}}

/* buttons / forms */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 20px;border-radius:var(--r);border:1px solid var(--line-strong);background:var(--bg);color:var(--ink);font:700 .9rem var(--font);cursor:pointer;transition:background .15s,transform .05s,box-shadow .15s;white-space:nowrap}
.btn:hover{background:var(--surface);text-decoration:none}.btn:active{transform:translateY(1px)}
.btn[disabled]{opacity:.5;pointer-events:none}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);box-shadow:0 8px 18px rgba(15,118,110,.25)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-lg{height:50px;padding:0 28px;font-size:1rem}.btn-sm{height:34px;padding:0 14px;font-size:.82rem}
.btn-ghost{border-color:transparent;background:transparent}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}
.field label{font-size:.82rem;font-weight:700;color:var(--ink-2)}
.input{width:100%;height:46px;padding:0 14px;border:1px solid var(--line-strong);border-radius:12px;background:#fff;font:500 .95rem var(--font);color:var(--ink);transition:border-color .15s,box-shadow .15s}
.input:focus{outline:0;border-color:var(--accent);box-shadow:var(--ring)}
.field.bad .input{border-color:var(--danger)}.err{color:var(--danger);font-size:.82rem;font-weight:600;min-height:1.1em}
.alert{padding:12px 14px;border-radius:12px;font-weight:600;font-size:.9rem}
.alert.bad{background:var(--danger-soft);color:var(--danger)}.alert.good{background:var(--ok-soft);color:var(--ok)}

/* cards */
.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(18px,3vw,28px);box-shadow:var(--sh)}
.grid{display:grid;gap:20px}.g2{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:860px){.g2,.g3{grid-template-columns:minmax(0,1fr)}}
.badge{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:.74rem;font-weight:700;background:var(--accent-soft);color:var(--accent)}
.badge.ok{background:var(--ok-soft);color:var(--ok)}.badge.bad{background:var(--danger-soft);color:var(--danger)}.badge.warn{background:var(--warn-soft);color:var(--warn)}

/* hero */
.hero{padding:clamp(48px,9vw,110px) 0 clamp(36px,6vw,64px);background:radial-gradient(900px 400px at 85% -10%,#CDEFE9 0,transparent 70%),radial-gradient(700px 360px at 0% 10%,#FFF3C9 0,transparent 65%)}
.hero h1{font-size:clamp(2.3rem,6vw,4.2rem);max-width:15ch}
.hero p.lead{font-size:1.15rem;color:var(--ink-2);max-width:56ch;margin:18px 0 28px}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.stats{display:flex;gap:clamp(18px,5vw,56px);flex-wrap:wrap;margin-top:44px}
.stats b{display:block;font-size:2rem;letter-spacing:-.03em;font-weight:800}
.sec{padding:clamp(40px,6vw,72px) 0}.sec h2{font-size:clamp(1.7rem,3.6vw,2.4rem);margin-bottom:10px}
.course h3{font-size:1.35rem;margin:10px 0 8px}.course .meta{display:flex;gap:18px;margin:16px 0 20px;color:var(--ink-2);font-weight:600;font-size:.9rem;flex-wrap:wrap}
.course .meta b{display:block;font-size:1.3rem;letter-spacing:-.02em;color:var(--ink)}
.steps{counter-reset:s}.steps li{list-style:none;counter-increment:s;display:flex;gap:14px;margin-bottom:14px}
.steps li::before{content:counter(s);flex:none;width:32px;height:32px;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:800;display:grid;place-items:center}
.foot{border-top:1px solid var(--line);padding:28px 0;color:var(--ink-3);font-size:.88rem;margin-top:40px}
.foot .wrap{display:flex;gap:16px;justify-content:space-between;flex-wrap:wrap}

/* auth */
.auth{max-width:440px;margin:clamp(24px,6vw,64px) auto}
.tabs{display:flex;background:var(--surface-2);padding:4px;border-radius:12px;margin-bottom:22px}
.tabs button{flex:1;height:38px;border:0;border-radius:9px;background:transparent;font:700 .9rem var(--font);color:var(--ink-2);cursor:pointer}
.tabs button.on{background:#fff;color:var(--ink);box-shadow:var(--sh)}

/* exam */
.exam-bar{position:sticky;top:68px;z-index:10;background:rgba(244,250,249,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);padding:12px 0}
.exam-bar .wrap{display:flex;align-items:center;gap:16px}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:1.15rem}.timer.low{color:var(--danger)}
.prog{flex:1;height:8px;background:var(--surface-2);border-radius:99px;overflow:hidden}.prog i{display:block;height:100%;background:var(--accent);width:0;transition:width .25s var(--ease)}
.q{max-width:760px;margin:28px auto}.q h2{font-size:1.35rem;letter-spacing:-.02em;margin:10px 0 20px}
.opt{display:flex;gap:12px;align-items:flex-start;width:100%;text-align:left;padding:14px 16px;margin-bottom:10px;border:1.5px solid var(--line-strong);border-radius:14px;background:#fff;font:600 1rem var(--font);cursor:pointer;transition:border-color .15s,background .15s}
.opt:hover{border-color:var(--accent)}.opt.on{border-color:var(--accent);background:var(--accent-soft)}
.opt b{flex:none;width:28px;height:28px;border-radius:50%;background:var(--surface-2);display:grid;place-items:center;font-size:.8rem}.opt.on b{background:var(--accent);color:#fff}
.exam-nav{display:flex;justify-content:space-between;gap:12px;max-width:760px;margin:24px auto}
.dots{display:flex;flex-wrap:wrap;gap:6px;max-width:760px;margin:0 auto}
.dots button{width:30px;height:30px;border-radius:8px;border:1px solid var(--line-strong);background:#fff;font:700 .75rem var(--font);cursor:pointer}
.dots button.done{background:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.dots button.cur{outline:2px solid var(--accent)}

/* result + verify */
.result{text-align:center;max-width:560px;margin:clamp(24px,6vw,64px) auto}
.result .big{font-size:4rem;font-weight:800;letter-spacing:-.04em}
.vres{margin-top:22px}.vok{border-left:6px solid var(--ok)}.vno{border-left:6px solid var(--danger)}
dl.kv{display:grid;grid-template-columns:130px 1fr;gap:10px 16px;margin-top:14px}dl.kv dt{color:var(--ink-3);font-weight:600}dl.kv dd{margin:0;font-weight:700}
table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);font-size:.92rem}th{color:var(--ink-3);font-size:.74rem;letter-spacing:.08em;text-transform:uppercase}

/* certificate (print-ready A4 landscape) */
.cert-wrap{display:flex;flex-direction:column;align-items:center;gap:20px;padding:24px 16px}
.cert{width:min(1000px,100%);aspect-ratio:1.414;background:#fff;border:1px solid var(--line);box-shadow:var(--sh-pop);padding:clamp(14px,3vw,34px);position:relative;container-type:inline-size}
.cert-in{height:100%;border:3px solid var(--accent);outline:1px solid var(--accent);outline-offset:-9px;display:flex;flex-direction:column;align-items:center;justify-content:space-between;text-align:center;padding:4cqw 6cqw}
.cert img.logo{height:6cqw}.cert .k{font-size:1.5cqw;letter-spacing:.35em;text-transform:uppercase;color:var(--ink-3);font-weight:700}
.cert h1{font-size:4.4cqw}.cert .who{font-size:5.6cqw;font-weight:800;letter-spacing:-.03em;color:var(--accent);border-bottom:2px solid var(--line-strong);padding:0 3cqw .6cqw}
.cert .what{font-size:2.5cqw;font-weight:700}.cert .sm{font-size:1.4cqw;color:var(--ink-3)}
.cert .row{width:100%;display:flex;justify-content:space-between;align-items:flex-end;gap:2cqw}
.cert .row img,.cert .row #qr{width:10cqw;height:10cqw}.cert #qr svg{width:100%;height:100%;display:block}.cert .idb{font-family:ui-monospace,Menlo,monospace;font-size:1.5cqw;font-weight:700}
.cert .stamp{font-size:1.3cqw}
@media print{@page{size:A4 landscape;margin:0}body{background:#fff}.no-print{display:none!important}.cert-wrap{padding:0}.cert{width:297mm;height:210mm;box-shadow:none;border:0}}